<template>
	<div :class="{ show: show }" class="header-search">
		<svg-icon
			class-name="search-icon"
			icon-class="search"
			@click.stop="click"
		/>
		<el-select
			ref="headerSearchSelectRef"
			v-model="search"
			:remote-method="querySearch"
			filterable
			default-first-option
			remote
			placeholder="Search"
			class="header-search-select"
			@change="change"
		>
			<el-option
				v-for="option in options"
				:key="option.item.path"
				:value="option.item"
				:label="option.item.title.join(' > ')"
			/>
		</el-select>
	</div>
</template>

<script lang="ts" setup>
import { ref, computed, nextTick, onMounted, watch, watchEffect } from "vue";
import { useRouter } from "vue-router";
import Fuse from "fuse.js";
import { getNormalPath } from "@/utils/ruoyi";
import { isHttp } from "@/utils/validate";
import usePermissionStore from "@/store/modules/permission";
import { ElSelect } from "element-plus";

const search = ref<string>();
const options = ref<any>();
const searchPool = ref<any>();
const show = ref<boolean>(false);
const fuse = ref<any>({});
const headerSearchSelectRef = ref<InstanceType<typeof ElSelect>>();
const router = useRouter();
const routes = computed(() => usePermissionStore().routes);

const click = () => {
	show.value = !show.value;
	if (show.value) {
		headerSearchSelectRef.value && headerSearchSelectRef.value.focus();
	}
};

const close = () =>{
	headerSearchSelectRef.value && headerSearchSelectRef.value.blur();
	options.value = [];
	show.value = false;
};

const change =  (val: any) => {
	const path = val.path;
	if (isHttp(path)) {
		// http(s):// 路径新窗口打开
		const pindex = path.indexOf("http");
		window.open(path.substr(pindex, path.length), "_blank");
	} else {
		router.push(path);
	}
	search.value = "";
	options.value = [];
	nextTick(() => {
		show.value = false;
	});
};

const initFuse = (list: any) => {
	fuse.value = new Fuse(list, {
		shouldSort: true,
		threshold: 0.4,
		location: 0,
		distance: 100,
		// maxPatternLength: 32,
		minMatchCharLength: 1,
		keys: [
			{
				name: "title",
				weight: 0.7,
			},
			{
				name: "path",
				weight: 0.3,
			},
		],
	});
};
// Filter out the routes that can be displayed in the sidebar
// And generate the internationalized title
const generateRoutes = (routes: any, basePath = "", prefixTitle = []) => {
	let res = [] as any;
	for (const r of routes) {
		// skip hidden router
		if (r.hidden) {
			continue;
		}
		const p =
			r.path.length > 0 && r.path[0] === "/" ? r.path : "/" + r.path;
		const data = {
			path: !isHttp(r.path) ? getNormalPath(basePath + p) : r.path,
			title: [...prefixTitle],
		} as any;
		if (r.meta && r.meta.title) {
			data.title = [...data.title, r.meta.title];
			if (r.redirect !== "noRedirect") {
				// only push the routes with title
				// special case: need to exclude parent router without redirect
				res.push(data);
			}
		}
		// recursive child routes
		if (r.children) {
			const tempRoutes = generateRoutes(
				r.children,
				data.path,
				data.title
			);
			if (tempRoutes.length >= 1) {
				res = [...res, ...tempRoutes];
			}
		}
	}
	return res;
};

const querySearch = (query: any) => {
	if (query !== "") {
		options.value = fuse.value.search(query);
	} else {
		options.value = [];
	}
};

onMounted(() => {
	searchPool.value = generateRoutes(routes.value);
});

watchEffect(() => {
	searchPool.value = generateRoutes(routes.value);
});

watch(show, (value) => {
	if (value) {
		document.body.addEventListener("click", close);
	} else {
		document.body.removeEventListener("click", close);
	}
});

watch(searchPool, (list) => {
	initFuse(list);
}, { immediate: true });
</script>

<style lang="scss" scoped>
.header-search {
	font-size: 0 !important;
	.search-icon {
		cursor: pointer;
		font-size: 18px;
		vertical-align: middle;
	}
	.header-search-select {
		font-size: 18px;
		transition: width 0.2s;
		width: 0;
		overflow: hidden;
		background: transparent;
		border-radius: 0;
		display: inline-block;
		vertical-align: middle;
		:deep(.el-input__inner) {
			border-radius: 0;
			border: 0;
			padding-left: 0;
			padding-right: 0;
			box-shadow: none !important;
			border-bottom: 1px solid #d9d9d9;
			vertical-align: middle;
		}
	}
	&.show {
		.header-search-select {
			width: 210px;
			margin-left: 10px;
		}
	}
}
</style>
